About: http://webisa.webdatacommons.org/299025259

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Generally, large amounts of pyrolysis tars are made as heavy by-products in the steam cracking of petroleum feedstocks to produce monomers, in particular ethylene, for the plastics industry.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com